the distance traversed by light in one mean solar year, about 5.88 trillion mi. (9.46 trillion km)
the movement or path of the earth or a heavenly body turning on its axis
any of the small bodies, often remnants of comets, traveling through space: when such a body enters the earth's atmosphere it is heated to luminosity and becomes a meteor
one of several hundred known celestial objects, generally believed to be rapidly rotating neutron stars, that emit pulses of radiation such as radio waves with a high degree of regularity
a transient fiery streak in the sky produced by a meteoroid passing through the earth's atmosphere also called a shooting star or bolide
a zodiacal constellation between Aries and Aquarius also called the Fishes